While catching up on some metrics reported by various publishers on ebook sales, I thought it would be a good idea to consolidate them in a quick list:

• Penguin ebook sales doubled in 2011---Penguin Group (USA) CEO David Shanks stated: “Our eBook sales doubled, we expanded our digital publishing programs, and we won a Pulitzer Prize for the second year in a row.”
• Association of American Publishers report ebook sales went up 72% in December---eBooks grew slightly over November 2011, closing out the year with an increase of 117% over 2010.
• Hachette Book Group reports 130% increase in ebook and audiobook sales in 2011---These digital products represented 22% of the company’s overall revenue in 2011, compared with 8% in 2010.
• Bloomsbury reported its eBook sales grew 38% in the fourth quarter of 2011 over sales during the same period last year---Chief executive Nigel Newton, stated: “We have a robust business, strongly adapted to the digital market place, that we have positioned to take full advantage of the continuing opportunities arising from growth of online sales and sales of ebooks.”